JP2005348944A - Elevating legless chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevating legless chair prevented from falling down to the back side, even if a movable seat portion is raised. <P>SOLUTION: The elevating legless chair 1 includes a support portion 10 installed on a floor surface, a movable seat portion 30 supported by the support portion 10 so as to rise/fall, an up-and-down driving portion 50 for raising/falling the movable seat portion 30. The support portion 10 has a guide shaft 12 extending in a direction (Z direction) substantially perpendicular to the floor surface 100. The movable seat portion 30 is supported by the guide shaft 12 so as to rise/fall. Additionally, the movable seat portion 30 includes a seat frame 31 formed substantially horizontal to the floor surface 100, and a back frame 33 formed substantially perpendicular to the seat frame 31. The back frame 33 is provided with a slope 49c inclined to the back side (inclined backward) with respect to the vertical direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an elevating seat chair, and more particularly, to an elevating seat chair capable of raising and lowering a seat portion.

  2. Description of the Related Art Conventionally, as a seat chair for assisting a user to sit and stand up, an elevating seat chair that can raise and lower a seat portion on which a user sits is known (for example, Patent Document 1, Patent). Reference 2).

  For example, in the elevating seat chairs described in Patent Literature 1 and Patent Literature 2, a support portion placed on the floor, a movable seat portion supported by the support portion so as to be movable up and down, and the movable seat portion is raised and lowered. An elevating drive unit is provided.

  The support portion is provided with a guide member that is inclined rearward with respect to the vertical direction, and the movable seat portion is provided with a moving body that is supported by the guide member so as to be movable. Thereby, the movable seat portion is configured to move up and down along the inclination direction of the guide member.

  The movable seat portion is formed with a seat member that is formed substantially horizontally and on which the user sits, and a back member that is integrally formed with the seat member and supports the upper body of the user. The back member is formed so as to be inclined to the back side with respect to the vertical direction so that the user can take a comfortable posture when sitting, and an armrest is provided on a side portion of the back member via a rotation mechanism. Is provided.

The elevating drive unit uses a rotation / linear motion conversion mechanism including a ball screw and a nut. Then, by rotating the ball screw or the nut with a motor or the like, the rotation of the motor or the like is converted into a linear movement of the nut in the vertical direction, and the movable seat portion is moved up and down together with the nut.
JP 11-128014 A (page 2-3, FIG. 1 to FIG. 3) JP-A-9-220134 (page 3-5, FIG. 1, FIG. 4, FIG. 5)

  However, in the elevating seat chair according to the above-described prior art, the guide member is provided so as to be inclined to the back side with respect to the vertical direction, and the movable seat portion is configured to be raised and lowered along the inclination direction of the guide member. As the movable seat rises, the center of gravity of the movable seat moves to the back side of the seat.

  Therefore, when the movable seat is raised, the center of gravity of the movable seat moves to the back side of the seat chair, and the seat chair sometimes falls to the back side.

  In the lift chair according to the above prior art, the armrest is provided on the side portion of the back member via the turning mechanism, but the shaft portion of the turning mechanism that holds the armrest rotatably is the back member. The configuration was simply attached. For this reason, when a load is applied to the armrest in a lateral direction, for example, when the user leans against the armrest, the armrest may spread in the lateral direction.

  As described above, in a state where the armrest is expanded in the lateral direction by applying a load to the armrest, the center of gravity of the movable seat portion moves outward in the lateral direction of the seated chair, and thus the seated chair may roll over.

  Furthermore, in the elevating seat chair according to the above-described prior art, the movable body provided on the movable seat portion holds the vertical positions separated in the longitudinal direction of the guide member by a pair of opposing guide rollers. It was a configuration.

  However, when the upper and lower positions separated in the longitudinal direction of the guide member are sandwiched by the pair of guide rollers, any of the guide rollers provided on the movable seat portion when the mounting error or bending occurs in the guide member. Is strongly pressed against the guide member, which may increase the resistance acting between the movable seat portion and the guide member.

  For this reason, even when the user tries to raise and lower the movable seat portion, there is a problem that the movable seat portion is not raised and lowered by a resistance force acting in the raising and lowering direction of the movable seat portion.

  Further, in the elevating seat chair according to the above prior art, even when a foreign object is caught in the movable seat portion while the movable seat portion is lowered, the lowering of the movable seat portion may continue as it is. there were. For this reason, there is a possibility that the seizure of the motor or the like may occur when foreign matter is caught in the movable seat portion.

  The present invention has been made in view of the above circumstances, and its purpose is to raise and lower a movable seat in a liftable seat that includes a movable seat that can be lifted and lowered relative to a support. However, it is in providing the raising / lowering seat chair which can prevent a seat chair falling to the back side.

  Another object of the present invention is to provide an elevating seat chair capable of preventing a rollover in an elevating seat chair provided with an armrest in a movable seat portion.

  Furthermore, another object of the present invention is to raise and lower the movable seat portion smoothly in an elevating seat chair in which positions spaced apart in the longitudinal direction of the guide member are respectively held by a pair of opposing guide rollers. An object of the present invention is to provide an elevating seat chair that can be used.

  Still another object of the present invention is an elevating seat that includes a movable seat that can be raised and lowered with respect to the support portion, and that can prevent foreign objects from being caught in the movable seat. To provide a chair.

  According to the elevating seat chair according to claim 1, the subject includes a support portion placed on a floor surface, a movable seat portion supported by the support portion so as to be movable up and down, and the movable seat portion. In the elevating seat chair provided with an elevating drive unit that moves up and down, the support unit is configured to include a guide member extending in a direction substantially perpendicular to the floor surface, and the movable seat unit is The problem is solved by being supported by the guide member so as to be movable up and down.

  Thus, when the support portion is configured to have a guide member extending in a direction substantially perpendicular to the floor surface, and the movable seat portion is supported by the guide member so as to be movable up and down, the movable seat portion is Can be lifted and lowered along a direction substantially perpendicular to the direction.

  Therefore, even if the movable seat rises, the center of gravity of the movable seat can be maintained at a fixed position of the support portion. Can be prevented.

  According to a second aspect of the present invention, there is provided a base frame in which the support portion is placed on the floor surface and the guide member is erected, and the base frame is provided along the floor surface from the position where the guide member is provided. When an extension frame that extends to the back side is provided, even if a load is applied to the movable seat part on the back side, the extension frame applies a force that acts in a direction that falls over the seat chair. Can be supported.

  Further, as described in claim 3, when a support frame that supports the guide member with respect to the extension frame is provided in the support portion, even when a load is applied to the movable seat portion on the back side, Since the support frame can prevent the guide member from being inclined (rearly tilted) to the back side, this reliably prevents the center of gravity of the movable seat portion from moving to the back side as the movable seat portion is raised. It becomes possible.

  Furthermore, as described in claim 4, the movable seat portion includes a seat surface member on which the user sits and a back member that supports the upper body of the user, and the back member is formed along a substantially vertical direction. In this case, since the protrusion of the back member to the back side can be reduced, the size of the seat chair in the front-rear direction can be reduced.

  Here, as described in claim 5, more preferably, the back member is formed with an inclined surface inclined to the back side with respect to the vertical direction. That is, the inclined surface is formed so as to incline backward with respect to the back member. In this way, when the inclined surface is formed on the back member, the shape of the back member can be a shape along the back and waist when the user is in a comfortable posture.

  According to a sixth aspect of the present invention, the support portion placed on the floor surface, the movable seat portion supported by the support portion so as to be movable up and down, and the lift drive unit that lifts and lowers the movable seat portion, In the elevating seat chair provided, the movable seat portion is configured to include an armrest that serves as a user's elbow rest, an armrest support member that supports the armrest, and a fixed support member that fixedly supports the armrest support member. When the armrest support member is configured to be fixedly supported by the fixed support member at at least two places, the armrest support member is fixedly supported at at least two positions on the fixed support member even when a load is applied laterally outward with respect to the armrest. As a result, it is possible to prevent the armrest from spreading outward in the lateral direction.

  Here, as described in claim 7, the fixed support member includes a seat member on which the user sits and a back member that supports the upper body of the user, and the armrest support member includes the seat member and the back member. When the load is applied laterally outward with respect to the armrest, the armrest support member can be fixedly supported by the seat member and the back member, so that the armrest can be laterally moved. It is possible to reliably prevent the outward expansion.

  Further, when the armrest is rotatably provided on the armrest support member as described in claim 8, for example, the armrest does not get in the way when sitting on the movable seat portion or standing up from the movable seat portion. This is preferable because the armrest can be moved as described above.

  According to a ninth aspect of the present invention, the support portion placed on the floor surface, the movable seat portion supported by the support portion so as to be movable up and down, and the lift drive unit that lifts and lowers the movable seat portion, 1st moving member formed by sandwiching a first position and a second position where the movable seat portion is separated in the longitudinal direction of the guide member by a pair of opposing guide rollers, respectively , Having a second moving member, and at least one of a pair of guide rollers provided on the first moving member or the second moving member, a resistance reduction for reducing a contact surface with the guide member When the guide part is formed, the resistance force acting between the guide member and the guide roller by the resistance reduction part even if the guide member is pressed against the guide roller due to an attachment error or bending of the guide member. To prevent the increase It is possible.

  In particular, as described in claim 10, when the resistance reduction portion is formed by separating the substantially central portion in the rotation axis direction of the guide roller, an attachment error, bending, or the like occurs in the guide member. Even if the guide member is pressed against the guide roller by this, it is preferable because the resistance reducing portion can reliably prevent an increase in the resistance force acting between the guide member and the guide roller.

  Further, as described in claim 11, the resistance reducing portion is formed on a guide roller disposed on the back side of the guide member among the pair of guide rollers provided on the first moving member or the second moving member. If the load is applied to the movable seat portion on the back side, the guide member is pushed to the back side, and even if the guide member is pushed against the guide roller, the resistance reducing portion causes the guide member and the guide roller to be pushed. This is preferable because it is possible to reliably prevent an increase in resistance acting between the two.

  Further, as described in claim 12, when one of the pair of guide rollers provided on the first moving member or the second moving member is disposed on the front side of the guide member, the movable seat portion is Even when a load is applied to the back side, it is preferable because the guide member can be reliably supported by the guide roller disposed on the front side of the guide member.

  And, as claimed in claim 13, a support part placed on the floor surface, a movable seat part supported by the support part so as to be able to be raised and lowered, and a lift drive part for raising and lowering the movable seat part, When the movable seat is configured to have a pinch detection unit that detects the pinch of foreign matter in the movable seat, the liftable seat is equipped with a foreign seat in the movable seat when the movable seat is lowered. Even if it occurs, it is possible to prevent the descent of the movable seat portion from being continued, which is preferable.

  In addition, as described in claim 14, the pinch detection unit includes a pinch detection switch provided on the floor surface side of the seat surface member, and the movable seat portion is moved up and down between the pinch detection switch and the floor surface. And a pinching detection plate that is movably disposed.

  According to the present invention, even if the movable seat rises, the center of gravity of the movable seat can be maintained at a fixed position of the support portion. It is possible to prevent the center of gravity from moving to the back side. Thereby, it becomes possible to prevent the seat chair from falling to the back side.

  In addition, even when a load is applied to the movable seat portion on the back side, the extension frame can support the force acting in the direction of falling on the seat chair. It is possible to reliably prevent the vehicle from falling to the back side.

  Furthermore, since the guide member can be prevented from tilting to the back side (backward tilting) by the support frame, it is possible to reliably prevent the center of gravity of the movable seat from moving to the back side as the movable seat rises. Is possible. Thereby, it is possible to more reliably prevent the seat chair from falling to the back side.

  Moreover, since the back member is formed along the substantially vertical direction, the protrusion of the back member to the back side can be reduced, and the size of the seat chair in the front-rear direction can be reduced. .

  In addition, since the back member is formed with an inclined surface that is inclined to the back side (rearly inclined) with respect to the vertical direction, the shape of the backrest of the elevating seat portion can be obtained when the user has a comfortable posture. The shape along the back portion and the waist portion can be obtained, so that the user can lean on the inclined surface in an easy posture without becoming a forward leaning posture or the like.

  Furthermore, even when a load is applied in the lateral direction with respect to the armrest, the armrest support member can be fixedly supported at at least two places on the fixed support member, so that the armrest can be prevented from spreading outward in the lateral direction. It is. Thereby, since it can prevent that the gravity center of a movable seat part moves to the horizontal direction outer side of a seat chair, it becomes possible to prevent that a seat chair rolls over.

  In addition, since the armrest support member is connected to the seat member and the back member, the armrest support member is fixedly supported by the seat member and the back member even when a load is applied laterally outward with respect to the armrest. Can do. Therefore, it is possible to reliably prevent the armrest from spreading outward in the lateral direction, and thus it is possible to reliably prevent the seat chair from overturning.

  In addition, since the armrest is pivotably provided on the armrest support member, for example, it is possible to move the armrest so that it does not get in the way when sitting on the movable seat or standing up from the movable seat It is. Thereby, it becomes possible to improve the usability of the elevating seat chair.

  Furthermore, even if the guide member is pressed against the guide roller due to an attachment error or bending in the guide member, the resistance reducing portion can prevent an increase in resistance force acting between the guide member and the guide roller. Is possible.

  Therefore, even when the user tries to raise or lower the movable seat portion, it is possible to prevent a problem that the movable seat portion is not raised or lowered due to the resistance force acting in the raising and lowering direction of the movable seat portion. It is possible to smoothly raise and lower the seat.

  In addition, even if the guide member is pressed against the guide roller due to an attachment error, bending, or the like, the guide roller has a resistance reduction portion formed by separating the substantially central portion in the rotation axis direction. Therefore, the resistance reducing portion can reliably prevent an increase in resistance force acting between the guide member and the guide roller. Thereby, it becomes possible to raise / lower a movable seat part more smoothly.

  Further, even if the guide member is pushed to the back side due to the load applied to the back side with respect to the movable seat portion, and the guide member is pushed against the guide roller by this, the resistance reducing portion is Of the pair of guide rollers provided on the two moving members, the guide roller is formed on the guide roller disposed on the back side of the guide member, so that the resistance reducing portion acts between the guide member and the guide roller. It is possible to reliably prevent the increase. Thereby, it becomes possible to raise / lower a movable seat part more smoothly.

  Furthermore, even when a load is applied to the back side of the movable seat portion, the guide member can be reliably supported by the guide roller disposed on the front side of the guide member. It becomes possible to prevent the seat from becoming difficult to move.

  Further, even when foreign objects are caught in the movable seat portion while the movable seat portion is being lowered, it is possible to prevent the lowering of the movable seat portion from being continued as it is. It is possible to prevent sticking and the like.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. It should be noted that members, arrangements, and the like described below do not limit the present invention, and it goes without saying that various modifications can be made in accordance with the spirit of the present invention.

  FIG. 1 to FIG. 21 are views showing an embodiment of the present invention, FIG. 1 is a perspective view showing the configuration of an elevating seat chair, FIG. 2 is a side view showing the configuration of the elevating seat chair, and FIG. FIG. 4 is a rear view showing the configuration of the liftable seat chair, FIG. 5 is a side view showing the configuration of the support portion, and FIG. 6 is a cross-sectional view taken along line AA in FIG. 7 is a rear view showing the configuration of the support portion, FIG. 8 is a cross-sectional view taken along the line BB of FIG. 7, FIG. 9 is a side view showing the configuration of the lifting seat portion, and FIG. FIG. 11 is a rear view showing the configuration of the lift seat, FIG. 12 is a side view showing the configuration of the armrest, FIG. 13 is a sectional side view showing the configuration of the armrest rotation mechanism, and FIG. FIG. 15 is an explanatory diagram showing how the armrest rotating mechanism operates, FIG. 16 is an explanatory diagram showing the configuration of the first moving member, and FIG. 18 is an explanatory diagram showing the configuration of the second moving member, FIG. 18 is an explanatory diagram showing the state where the elevating seat is covered with the covering member, FIG. 19 is a side view showing the configuration of the elevating drive unit, and FIG. The bottom view which shows a structure, FIG. 21 is a block diagram which shows the electrical structure of an elevating seat chair.

First, the mechanical configuration of the liftable seat 1 according to an embodiment of the present invention will be described.
In the following description, as shown in FIG. 1, the seat 3 side with respect to the back 2 is the front side (front side), and the back 2 side with respect to the seat 3 is the back side (rear side). . Further, when the seat 3 side is viewed from the back 2, the right side is the right side, and when the seat 3 is viewed from the back 2, the left side is the left side.

  As shown in FIGS. 2 to 4, the elevating seat 1 according to the present embodiment is suitably used as a seat while being placed on a floor surface 100 such as a Japanese-style room or a Western-style room. And has a support portion 10, a movable seat portion 30, and an elevating drive portion 50.

  The support part 10 supports the movable seat part 30 and the raising / lowering drive part 50, and as shown in FIG. 5 thru | or FIG. 8, the base frame 11, the guide shafts 12 and 13 (equivalent to a guide member), a shaft The support frames 14 and 15, the upper frame 16, the reinforcing shafts 17 and 18, the motor fixing member 19, the bearing fixing member 21, the lifting detection mechanism 22, and the motor cover 23 are configured.

  The base frame 11 is placed on a floor surface 100 such as a Japanese-style room or a Western-style room, and serves as a base for supporting the movable seat portion 30 and the lift drive portion 50. The base frame 11 of the present example has a size that does not interfere with the use of the elevating seat 1 in a Japanese-style room or a Western-style room, and the elevating seat is even when the user sits on the movable seat 30. 1 is set to a size that does not fall forward, backward and sideways.

  The base frame 11 is provided with a pair of parallel frame portions 11a and 11b extending along the front-rear direction (Y direction) of the elevating seat chair 1, and the parallel frame portions 11a and 11b are elevating seat chairs. The child frames 1 are connected to each other by connecting frame portions 11c, 11d, and 11e extending along the left-right direction (X direction).

  The guide shafts 12 and 13 are for guiding the movable seat portion 30 along the vertical direction (Z direction), and are formed of a substantially cylindrical body. The left guide shaft 12 is provided at a position closer to the center than the rear side end of the parallel frame portion 11a, and extends along a direction (Z direction) substantially perpendicular to the floor surface 100.

  Similarly, the right guide shaft 13 is provided at a position closer to the center than the rear side end of the parallel frame portion 11b, and extends along a direction (Z direction) substantially perpendicular to the floor surface 100. Yes.

  In this example, as described above, the guide shaft 12 is arranged at a position closer to the center than the rear side end of the left parallel frame portion 11a, so that the extended frame portion 11f is formed in the parallel frame portion 11a. Is formed.

  The extension frame portion 11f is formed so as to extend toward the back side along the floor surface 100 from the position where the guide shaft 12 of the parallel frame portion 11a is disposed.

  Similarly, an extending frame portion 11g is formed in the parallel frame portion 11b by arranging the guide shaft 13 at a position closer to the center than the rear side end portion of the right parallel frame portion 11b.

  The extending frame portion 11g is formed to extend toward the back side along the floor surface 100 from the position where the guide shaft 13 of the parallel frame portion 11b is disposed.

  Thus, in this example, since the extension frame portions 11f and 11g are formed on the base frame 11, even when a load is applied to the movable seat portion 30 on the back side, the base frame 11 falls over the seat chair. It is possible to support the force acting in the direction to be extended by the extension frame portions 11f and 11g. Therefore, it is possible to prevent the seat chair from falling to the back side.

  The left shaft support frame 14 is for supporting the guide shaft 12 with respect to the extending frame portion 11f, and has a wide rib formed integrally with a rib 14a having a substantially triangular shape in side view and a lower end of the rib 14a. It has the shape-like mounting surface 14b.

  The vertical side 14c of the rib 14a is integrally fixed to a portion from the longitudinal center portion of the guide shaft 12 to the lower end portion, and the mounting surface 14b is fixed to the extending frame portion 11f of the parallel frame portion 11a. Yes.

  Similarly, the right shaft support frame 15 is for supporting the guide shaft 13 with respect to the extending frame portion 11g, and is formed integrally with a rib 15a having a substantially triangular shape in side view and a lower end of the rib 15a. And a wide mounting surface 15b.

  The vertical side 15c of the rib 15a is integrally fixed to a portion from the longitudinal center portion to the lower end portion of the guide shaft 13, and the mounting surface 15b is fixed to the extending frame portion 11g of the parallel frame portion 11b. Yes.

  Thus, in this example, since the shaft support frames 14 and 15 which support the guide shafts 12 and 13 with respect to the extension frame parts 11f and 11g are provided, the load on the back side with respect to the movable seat part 30 is provided. Even when the guide shaft 12 is added, it is possible to prevent the guide shafts 12 and 13 from inclining to the back side (inclining backward). Therefore, it is possible to prevent the center of gravity of the movable seat 30 from moving to the back side.

  The upper frame 16 is extended along the left-right direction (X direction) of the elevating seat 1, and upper end portions of the guide shafts 12 and 13 are fixed to the upper frame 16 in this example. .

  The reinforcing shafts 17 and 18 are for improving the strength of the rectangular frame in front view formed by fixing the guide shafts 12 and 13 to the upper frame 16 and the base frame 11. It is arranged between the guide shaft 13.

  The reinforcing shafts 17 and 18 of the present example are configured by a substantially cylindrical body extending from the base frame 11 toward the upper frame 16, and one ends of the reinforcing shafts 17 and 18 are fixed to the connecting frame portion 11d, respectively. The other ends of the reinforcing shafts 17 and 18 are fixed to the upper frame 16, respectively.

  The motor fixing member 19 is for fixing the motor 51 provided in the raising / lowering drive part 50 mentioned later, and is comprised so that the connection frame part 11d and the connection frame part 11e may be connected by the upper side of the base frame 11. FIG. Yes.

  The bearing fixing member 21 is for fixing bearing members 55 and 56 provided in a lifting drive unit 50 described later, and is provided at the center of the lower surface of the upper frame 16.

  The raising / lowering detection mechanism 22 is for detecting the raising / lowering position of the movable seat part 30, and has a rising end detection switch 22a and a lowering end detection switch 22b.

  The ascending end detection switch 22a and the descending end detection switch 22b are fixed to the right shaft support frame 15 via a mounting bracket 22c.

  In this example, when the movable seat 30 is in the most elevated state, the rising end detection switch 22a comes into contact with the contact piece 48 provided on the movable seat 30, and the movable seat 30 is lowered most. In this state, the lower end detection switch 22b comes into contact with the contact piece 48 provided on the movable seat portion 30.

  In this example, the ascending / descending detection mechanism 22 is provided with the rising end detecting switch 22a and the descending end detecting switch 22b, which are limit switches. A rotary encoder may be provided to detect the lift position.

  The motor cover 23 is for protecting a motor 51 provided in an elevating drive unit 50 described later, and is fixed to the back side of the motor fixing member 19. The motor cover 23 of this example includes a back cover portion 23a extending in a substantially vertical direction of the base frame 11, and a top cover portion 23b extending in a substantially horizontal direction from an end portion of the back cover portion 23a. Has been.

  The movable seat portion 30 is movable along a substantially vertical direction (Z direction) with respect to the support portion 10, and as shown in FIGS. 9 to 18, a seat surface frame 31 (corresponding to a seat surface member), The sandwiching detection mechanism 32, the rear frame 33 (corresponding to a seating surface member), armrests 34 and 35, armrest rotation mechanisms 36 and 37, side frames 41 and 42, a covering member 49, and the like are configured.

  The seating surface frame 31 is configured by a frame body substantially parallel to the base frame 11, and is disposed so as to face the base frame 11. A pinch detection mechanism 32 is provided on the back surface of the seating surface frame 31.

  The pinch detection mechanism 32 is for detecting that a foreign object is pinched between the movable seat 30 and the support 10 when the movable seat 30 is lowered, and the pinch detection switches 32a, 32b, and 32c. , 32d, a base plate 32e, a pinching detection plate 32f, and the like.

  The pinch detection switches 32a, 32b, 32c, and 32d are provided at the four corners of the back surface of the base plate 32e, and are configured to be switched on when they come into contact with the pinch detection plate 32f provided on the back surface side of the base plate 32e. ing.

  The pinching detection plate 32f is configured to have a size capable of covering a wide area on the back side of the seating surface frame 31 so that pinching detection in the movable seat portion 30 can be performed with high accuracy.

  The pinching detection plate 32f of this example is biased toward the vertically lower side of the base plate 32e by a spring member 32g. In a normal state without pinching, the pinching detection plate 32f and the pinching detection switches 32a, 32b, 32c, and 32d are separated from each other.

  It should be noted that increase / decrease in motor drive current flowing in the motor 51 of the lifting / lowering drive unit 50 to be described later may be detected, and foreign object pinching may be detected in the movable seat 30 based on the increase in the motor drive current.

  In addition, a rotary encoder may be provided in the motor 51, and the trapping of the foreign matter may be detected in the movable seat portion 30 based on the fact that the cycle of the rotation pulse signal from the rotary encoder is delayed.

  The back frame 33 is provided on the back side of the seat frame 31 and includes armrest support frame portions 33a and 33b and a back frame portion 33c.

  The armrest support frame portions 33a and 33b are for supporting the armrest rotation mechanisms 36 and 37, respectively, and are integrally formed at both ends of the back frame portion 33c.

  The armrest support frame portion 33a is formed with an outer support piece 33f and an inner support piece 33h extending along the front-rear direction (Y direction) of the liftable seat 1 and the armrest support frame portion 33b is liftable. An outer support piece 33g and an inner support piece 33i extending along the front-rear direction (Y direction) of the seat 1 are formed.

  The outer support pieces 33f and 33g are formed on the outer sides in the lateral direction of the movable seat portion 30, and are fixed to the side portions of the seating surface frame 31, respectively. The inner support pieces 33h and 33i are respectively formed on the inner side in the lateral direction with respect to the outer support pieces 33f and 33g, and are formed integrally with the rear frame portion 33c.

  The outer support piece 33f and the inner support piece 33h are connected by a connecting portion 33j, and the outer support piece 33g and the inner support piece 33i are connected by a connecting portion 33k.

  The outer support piece 33f is formed with a support hole 33l penetrating in the lateral direction of the elevating seat 1, and the inner support piece 33h is formed with a support hole 33n coaxially with the support hole 33l. . A rotation shaft member 36d of the armrest rotation mechanism 36 is rotatably inserted into the support holes 33l and 33n.

  Similarly, a support hole 33m penetrating in the lateral direction of the elevating seat 1 is formed in the outer support piece 33g, and a support hole 33o is formed coaxially with the support hole 33m in the inner support piece 33i. Has been. A rotation shaft member 37d of the armrest rotation mechanism 37 is rotatably inserted into the support holes 33m and 33o.

  As described above, in this example, the armrest support frame portions 33a and 33b that support the armrests 34 and 35 are connected to the seat frame 31 and the back frame portion 33c. Even when a load is applied, the armrest support frame portions 33a and 33b can be fixedly supported by the seat frame 31 and the back frame portion 33c. Thereby, it is possible to prevent the armrests 34 and 35 from spreading outward in the lateral direction.

  Therefore, it is possible to prevent the center of gravity of the movable seat 30 from moving laterally outward of the liftable seat 1, so that the liftable seat 1 can be prevented from rolling over.

  The back frame portion 33 c serves as a framework for forming a backrest on the movable seat portion 30, and is formed substantially perpendicular to the seat surface frame 31.

  Thus, when the back frame part 33c is formed substantially perpendicular to the seat frame 31, the overhang of the back frame part 33c to the back side can be reduced. It is possible to reduce the size in the front-rear direction (Y direction).

  A nut mounting portion 33d is formed on the back surface side of the back frame portion 33c, and a nut 33e that is screwed with a ball screw 57 of the elevating drive unit 50 described later is provided on the nut mounting portion 33d.

  The armrests 34 and 35 serve as a user's elbow rest. The armrest 34 includes an armrest frame 34a and an armrest cover 34b, and the armrest 35 includes an armrest frame 35a and an armrest cover 35b.

  The armrest frame 34a is covered with an armrest cover 35b so as to cover the entire armrest frame 34a, and the armrest frame 35a is covered with an armrest cover 35b so as to cover the entire armrest frame 35a.

  An elevating switch 38 for elevating the movable seat 30 is provided on the inner side of the distal end portion of the right armrest frame 35a.

  As shown in FIG. 1, the armrest cover 35b that covers the right armrest frame 35a has an opening 49d at a position corresponding to the lift switch 38. The lift switch 38 is operated via the opening 49d. Can be done.

  Further, in this example, the up / down switch 38 is provided inside the distal end portion of the armrest frame 35a, so that it is possible to prevent erroneous operation and the like.

  As shown in FIGS. 12 and 13, a first engagement hole 34c is formed on one end side of the armrest frame 34a along the lateral direction of the elevating seat 1, and the first engagement hole 34c. Is engaged with a rotation shaft member 36d of the armrest rotation mechanism 36.

  In addition, a second engagement hole 34d is formed in the vicinity of the first engagement hole 34c of the armrest frame 34a along the lateral direction of the elevating seat 1, and the second engagement hole 34d has a second engagement hole 34d. The locking member 36c of the armrest rotating mechanism 36 is engaged.

  The right armrest frame 35a is in a line-symmetric relationship with the left armrest frame 34a, and a detailed description thereof is omitted.

  The armrest rotating mechanism 36 is for rotatably supporting the armrests 34 and 35 within a predetermined rotation range, and as shown in FIG. 13, the outer cylinder portion 36a and the rotation restricting member 36b. The locking member 36c and the rotating shaft member 36d are provided.

  The outer cylinder portion 36a is fixed to the outer surface of the outer support piece 33f formed on the armrest support frame portion 33a. An inner space 36e is formed in the outer cylinder portion 36a, and a rotation restricting member 36b is inserted and disposed in the inner space 36e.

  The rotation restricting member 36b is for restricting the movement of the locking member 36c accompanying the rotation of the armrest frame 34a, and has a substantially C-shaped cross section having a first locking portion 36f and a second locking portion 36g. It is configured.

  One end of the locking member 36c is engaged with the second engagement hole 34d of the armrest support frame portion 33a, and protrudes along the lateral direction of the elevating seat chair 1 from the second engagement hole 34d. The protruding portion is inserted and disposed in a fan-shaped space portion 36h formed between the first locking portion 36f and the second locking portion 36g of the rotation restricting member 36b.

  One end of the rotation shaft member 36d is engaged with the first engagement hole 34c of the armrest support frame portion 33a, and the protruding portion of the rotation shaft member 36d protruding from the first engagement hole 34c is connected to the outer cylinder portion 36a. Via the outer support piece 33f and the inner support piece 33h of the armrest support frame portion 33a.

  As described above, in this example, one end of the rotation shaft member 36d is fixed to the armrest frame 34a, and the other end of the rotation shaft member 36d is rotatably supported by the armrest support frame portion 33a. Is freely rotatable.

  When the locking member 36c is formed in the first locking portion 36f of the rotation restricting member 36b, the armrest 34 is substantially horizontal with the floor surface 100, and as shown in FIGS. 14 and 15, the locking member In a state where 36c is locked to the second locking portion 36g of the rotation restricting member 36b, the armrest 34 is configured to be substantially perpendicular to the floor surface 100.

  As described above, since the armrests 34 and 35 are rotatably provided on the armrest support frame portions 33a and 33b, respectively, for example, when the armrest 34 is seated on the movable seat portion 30 or rises from the movable seat portion 30, the armrest 34 is provided. , 35 can be moved so that they do not get in the way.

  The right armrest rotating mechanism 37 is in a line-symmetric relationship with the left armrest rotating mechanism 36, and the configuration thereof is the same, and thus detailed description thereof is omitted.

  The side frames 41 and 42 are for supporting the movable seat portion 30 so as to be movable up and down with respect to the support portion 10, and are integrally fixed to both ends of the back surface of the back frame portion 33 c.

  A first moving member 43 is provided at a substantially central position in the longitudinal direction of the side frame 41, and a second moving member 45 is provided below the side frame 41.

  Similarly, a first moving member 44 is provided at a substantially central position in the longitudinal direction of the side frame 42, and a second moving member 46 is provided below the side frame 41.

  The first moving members 43, 44 and the second moving members 45, 46 are supported by the guide shafts 12, 13 so as to be movable up and down, so that the movable seat 30 is in a direction substantially perpendicular to the floor surface 100. Along the way.

  Thus, in this example, since the movable seat portion 30 is configured to be lifted and lowered along a direction substantially perpendicular to the floor surface 100, the movable seat portion can be moved even if the movable seat portion 30 is raised. It is possible to maintain the center of gravity of 30 at a fixed position of the support portion 10. Therefore, it is possible to prevent the center of gravity of the movable seat portion 30 from moving to the back side as the movable seat portion 30 moves up, as in the prior art.

  As shown in FIG. 16, the first moving member 43 includes upper guide rollers 43a and 43b and shafts 43c and 43d. The first moving member 44 includes upper guide rollers 44a and 44b and a shaft 44c. , 44d.

  The upper guide rollers 43a and 43b are disposed so as to sandwich the guide shaft 12, and are rotatably supported by the shafts 43c and 43d, respectively.

  Similarly, the upper guide rollers 44a and 44b are disposed so as to sandwich the guide shaft 13 and are rotatably supported by the shafts 44c and 44d, respectively.

  The upper guide rollers 43a and 43b are respectively formed with curved surface portions 43e and 43f along the curved surface of the guide shaft 12. In this example, the curved surface portions 43e and 43f are in contact with the guide shaft 12 and are on the upper side. Guide rollers 43a, 43b roll on the guide shaft 12.

  Similarly, the upper guide rollers 44a and 44b are respectively formed with curved surface portions 44e and 44f along the curved surface of the guide shaft 13. In this example, the curved surface portions 44e and 44f are in contact with the guide shaft 13. In this state, the upper guide rollers 43a and 43b roll on the guide shaft 13.

  As shown in FIG. 17, the second moving member 45 includes lower guide rollers 45a and 45b and shafts 45c and 45d. The second moving member 46 includes lower guide rollers 46a and 46b. It has shafts 46c and 46d.

  The lower guide rollers 45a and 45b are disposed so as to sandwich the guide shaft 12, and are rotatably supported by shafts 45c and 45d, respectively.

  Similarly, the lower guide rollers 46a and 46b are disposed so as to sandwich the guide shaft 13 and are rotatably supported by the shafts 46c and 46d, respectively.

  The lower guide roller 45a is formed with a curved surface portion 45e along the curved surface of the guide shaft 12. In this example, the lower guide roller 43a guides the curved surface portion 43e in contact with the guide shaft 12. It rolls on the shaft 12.

  Similarly, a curved portion 46e is formed on the lower guide roller 46a so as to follow the curved surface of the guide shaft 13. In this example, the lower guide roller is in a state where the curved portion 46e is in contact with the guide shaft 13. 46 a rolls on the guide shaft 13.

  The lower guide roller 45b provided on the back side of the elevating seat 1 has a structure separated at a substantially central portion in the rotation axis direction, and a contact surface with the guide shaft 12 by the separated portion. The resistance reduction part 45f which reduces is formed.

  Thus, when the resistance reduction part 45f is formed in the lower guide roller 45b provided in the back side of the raising / lowering seat 1, the guide shaft 12 is caused by an attachment error, bending, or the like. Even when the guide roller 45b is pressed against the guide roller 45b, the resistance reducing portion 45f can prevent an increase in resistance force acting between the guide shaft 12 and the lower guide roller 45b.

  Similarly, the lower guide roller 46b provided on the back side of the elevating seat 1 is configured to be separated at a substantially central portion in the rotation axis direction, and the guide shaft 13 and the guide shaft 13 are separated by the separated portion. The resistance reduction part 46f which reduces the contact surface is formed.

  Thus, when the resistance reduction part 46f is formed in the lower side guide roller 46b provided in the back side of the raising / lowering seat 1, the guide shaft 13 is caused by an attachment error, bending, or the like. Even when pressed against the lower guide roller 46b, the resistance reducing portion 46f can prevent an increase in resistance force acting between the guide shaft 13 and the lower guide roller 46b.

  Further, when the load is applied to the movable seat portion 30 on the back side, the guide shafts 12 and 13 are pushed to the back side, and thus the guide shafts 12 and 13 are pushed against the lower guide rollers 45b and 46b. Since the resistance reduction portions 45f and 46f are formed on the lower guide rollers 45b and 46b disposed on the back side of the guide shafts 12 and 13, the resistance reduction portions 45f and 46f and the guide shafts 12 and 13 and the lower guide are provided. It is possible to reliably prevent an increase in resistance force acting between the rollers 45b and 46b. Therefore, it is possible to raise and lower the movable seat 30 more smoothly.

  Further, since the upper guide rollers 43a and 44b and the lower guide rollers 45a and 46a are disposed on the front side of the guide shafts 12 and 13, even when a load is applied to the movable seat 30 on the back side, The guide shafts 12 and 13 can be reliably supported by the guide rollers 43a and 44b and the lower guide rollers 45a and 46a.

  A contact piece 48 is provided on the second moving member 46 of the right side frame 42. As described above, the abutting piece 48 is for detecting the position of the movable seat portion 30 and is disposed at a position where the abutting end detecting switch 22a and the descending end detecting switch 22b abut.

  As shown in FIG. 18, the covering member 49 includes a cushion material 49a that covers the seat frame 31, the back frame 33, and the side frames 41 and 42, and a skin material 49b that covers these cushion materials 49a.

  An inclined surface 49c that is inclined to the back side with respect to the vertical direction (Z direction) is formed on the front side portion (back portion) of the covering member 49. In this example, when the user leans against the inclined surface 49c formed on the covering member 49, the user can take a comfortable posture.

  The skin material 49b according to the present embodiment is configured so as to be able to cover all of the support portion 10, the movable seat portion 30, and the elevating drive portion 50 (that is, a configuration that is not an external device). ) If comprised in this way, since it can give a feeling of unity to the raising / lowering seat 1, the appearance design property of the raising / lowering seat 1 will also become favorable.

  The raising / lowering drive part 50 is for raising / lowering the movable seat part 30 along the vertical direction (Z direction) with respect to the support part 10, and as shown in FIG. 19, FIG. And a pulley 53, a belt 54, bearing members 55 and 56, and a ball screw 57.

  The motor 51 is fixed to the motor fixing member 19 provided in the support portion 10, and a motor pulley 52 is provided on the output shaft 51 a of the motor 51. The pulley 53 is provided at one end of the ball screw 57, and a belt 54 is wound around the motor pulley 52 and the pulley 53.

  A portion of the ball screw 57 above the pulley 53 is rotatably supported by the bearing member 55, and an upper end portion of the ball screw 57 is rotatably supported by the bearing member 56. The bearing member 55 is fixed to the motor fixing member 19, and the bearing member 56 is fixed to the bearing fixing member 21.

  A nut 33e provided on the movable seat 30 is screwed to the ball screw 57. In this example, when the ball screw 57 rotates, the movable seat 30 moves along the vertical direction according to the rotation direction of the ball screw 57. It is configured to move up and down.

  Next, the electrical configuration of the elevating seat 1 according to one embodiment of the present invention will be described with reference to FIG.

  In the liftable seat 1 of this example, as a detection switch for outputting various detection signals, a lift switch 38, pinching detection switches 32a, 32b, 32c, 32d, a rising end detection switch 22a, and a falling end detection switch 22b are provided. Is provided.

  The elevating switch 38, the pinching detection switches 32a, 32b, 32c, and 32d, the rising end detecting switch 22a, and the falling end detecting switch 22b are connected to the input side terminal of the control unit 70 and connected to the output side terminal of the control unit 70. Is connected to the motor 51.

  The control unit 70 is configured by an electric circuit including a microcomputer and the like, and detection signals output from the elevating switch 38, the pinching detection switches 32a, 32b, 32c, and 32d, the rising end detecting switch 22a, and the falling end detecting switch 22b. The motor 51 is configured to perform predetermined processing according to the control.

  In addition, as a power supply of the liftable seat 1, for example, a household power supply (AC100V) may be used, or a rechargeable storage battery (not shown) may be used. Moreover, the exterior part of the liftable seat 1 may be provided with a power lamp, an activation lamp, or the like, and may be provided with a speaker or the like that notifies activation or stoppage.

Next, operation | movement of the raising / lowering seat 1 which consists of the said structure is demonstrated.
When the elevating switch 38 is operated to “up”, an up operation signal is output to the control unit 70, and predetermined power is supplied from the control unit 70 to the motor. As a result, the motor 51 rotates in a predetermined direction, and this rotational force is transmitted to the ball screw 57 via the motor pulley 52, the belt 54, and the pulley.

  When the ball screw 57 rotates in a predetermined direction, the rotational force of the ball screw 57 is converted into a linear movement of the nut 33e, and the movable seat portion 30 rises along the substantially vertical direction (Z direction) together with the nut 33e.

  When the movable seat portion 30 moves to the uppermost position and the contact piece 48 contacts the rising end detection switch 22a, a rising detection signal is output from the rising end detection switch 22a to the control unit 70.

  When the control unit 70 detects the rising detection signal output from the rising end detection switch 22a, the control unit 70 stops the supply of power to the motor 51. As a result, the motor 51 is stopped, and the movable seat portion 30 is stopped at the uppermost position.

  Therefore, when seated from now on, the user can easily sit on the movable seat portion 30 without being forced to take an excessive posture. Further, when the movable seat 30 is raised to the uppermost position while the user is seated on the movable seat 30, the user can easily stand up.

  Here, even if the movable seat portion 30 is raised, the center of gravity of the movable seat portion 30 can be maintained at a fixed position of the support portion 10. Therefore, as the movable seat portion 30 is raised, It is possible to prevent the center of gravity of 30 from moving to the back side, and to prevent the seat chair from falling to the back side.

  In addition, before the movable seat part 30 moves to the uppermost position, it can be adjusted to an arbitrary height according to the user's request by operating the elevating switch 38 to “stop”.

  On the other hand, when the elevating switch 38 is operated to “down”, a lowering operation signal is output to the control unit 70, and predetermined power is supplied from the control unit 70 to the motor. At this time, the polarity of the voltage applied to the motor 51 is opposite to that when the elevating switch 38 is “raised”.

  When a predetermined electric power is supplied from the control unit 70 to the motor 51, the motor 51 rotates in the opposite direction to when the movable seat 30 is raised, and the ball screw 57 also raises the movable seat 30. Rotate in the opposite direction.

  Thereby, with the rotation of the ball screw 57, the movable seat portion 30 moves down along the substantially vertical direction (Z direction) together with the nut 33e, and the movable seat portion 30 eventually moves to the lowest position. When the contact piece 48 contacts the lower end detection switch 22b, the lower end detection switch 22b outputs a lower detection signal to the control unit 70.

  When the control unit 70 detects the descent detection signal output from the descent end detection switch 22b, the control unit 70 stops supplying power to the motor 51. As a result, the motor 51 is stopped, and the movable seat portion 30 is stopped at the lowest position.

  In addition, before the movable seat part 30 moves to the lowest position, it can be adjusted to an arbitrary height according to the user's request by operating the elevating switch 38 to “stop”.

  Thus, in the liftable seat 1 of this example, since the movable seat part 30 can be raised / lowered to arbitrary height, the burden at the time of a user's standing-up or seating can be reduced.

  Here, when a foreign object is caught in the movable seat part 30 while the movable seat part 30 is being lowered, the sandwiching detection mechanism 32 detects the inclusion of the foreign substance. In other words, when a foreign object comes into contact with the pinching detection plate 32f, the pinching detection plate 32f rises against the inactive force of the spring member 32g, and any of the pinching detection switches 32a to 32d is switched on.

  Thus, when any of the pinching detection switches 32a to 32d is switched on, a pinching detection signal is output to the control unit 70 from any of the pinching detection switches 32a to 32d.

  When detecting the pinching detection signal, the controller 70 determines that a foreign object has been pinched in the movable seat 30 and stops the motor 51. As a result, the movable seat 30 is stopped, and foreign matter is prevented from being caught in the movable seat 30.

As described above, according to the present embodiment, the following effects are obtained.
According to this embodiment, even if the movable seat portion 30 is raised, the center of gravity of the movable seat portion 30 can be maintained at a fixed position of the support portion 10, so that the movable seat portion 30 is raised as in the prior art. Accordingly, the center of gravity of the movable seat 30 can be prevented from moving to the back side. Therefore, it is possible to prevent the liftable seat 1 from falling to the back side.

  In addition, even when a load is applied to the movable seat portion 30 on the back side, the force acting in the direction of falling on the seat chair can be supported by the extension frames 11f and 11g. It is possible to reliably prevent the chair 1 from falling to the back side.

  Further, the shaft support frames 14 and 15 can prevent the guide shafts 12 and 13 from inclining to the back side (backward inclining). It is possible to more surely prevent the movement.

  Moreover, since the back frame 33 is formed along the substantially vertical direction (Z direction), the protrusion of the back frame 33 to the back side can be reduced, and the size of the liftable seat 1 in the front-rear direction is reduced. Can be miniaturized.

  Moreover, since the inclined surface 49c which inclines to the back side with respect to a perpendicular direction (Z direction) is formed in the back frame 33, the shape of the back part 2 (backrest) of the raising / lowering seat part 30 is used. It is possible to make the shape along the back and waist when the user is in an easy posture, and the user can lean on the inclined surface in an easy posture without becoming a forward leaning posture or the like.

  Furthermore, according to the present embodiment, the armrest support frame portions 33a and 33b that support the armrests 34 and 35 are connected to the seat frame 31 and the back frame portion 33c, so Even when a load is applied to the outside, the armrest support frame portions 33a and 33b can be fixedly supported by the seat frame 31 and the back frame portion 33c. Thereby, it is possible to prevent the armrests 34 and 35 from spreading outward in the lateral direction.

  Accordingly, the center of gravity of the movable seat portion 30 can be prevented from moving outward in the lateral direction of the seat chair, so that the elevating seat chair 1 can be prevented from rolling over.

  Further, since the armrests 34 and 35 are rotatably provided on the armrest support frame portions 33a and 33b, for example, when the armrests 34 and 35 are seated on the movable seat portion 30 or are raised from the movable seat portion 30, the armrests 34 and 35 are provided. It is possible to move the armrests 34 and 35 so as not to get in the way. Therefore, it is possible to improve the usability of the liftable seat 1.

  Furthermore, according to the present embodiment, even if the guide shafts 12 and 13 are pressed against the lower guide rollers 45b and 46b due to an attachment error or bending in the guide shafts 12 and 13, the resistance reducing portions 45f and 46f. Thus, it is possible to prevent an increase in resistance force acting between the guide shafts 12 and 13 and the lower guide rollers 45b and 46b.

  Therefore, even when the user tries to raise or lower the movable seat portion 30, it is possible to prevent a problem that the movable seat portion 30 is not raised or lowered due to a resistance force acting in the raising and lowering direction of the movable seat portion 30. It is possible to raise and lower the portion 30 smoothly.

  Further, even if the guide shafts 12 and 13 are pressed against the lower guide rollers 45b and 46b due to an attachment error or bending in the guide shafts 12 and 13, the lower guide rollers 45b and 46b have a rotational axis direction. The resistance reduction portions 45f and 46f formed by separating the substantially central portion of the guide shaft 12 are provided between the guide shafts 12 and 13 and the lower guide rollers 45b and 46b by the resistance reduction portions 45f and 46f. It is possible to reliably prevent an increase in the resistance force acting on the. Therefore, it is possible to raise and lower the movable seat 30 more smoothly.

  Further, when the load is applied to the movable seat portion 30 on the back side, the guide shafts 12 and 13 are pushed to the back side, and thus the guide shafts 12 and 13 are pushed against the lower guide rollers 45b and 46b. Since the resistance reduction portions 45f and 46f are formed on the lower guide rollers 45b and 46b disposed on the back side of the guide shafts 12 and 13, the resistance reduction portions 45f and 46f are connected to the guide shafts 12 and 13 and the lower side. It is possible to reliably prevent an increase in resistance force acting between the guide rollers 45b and 46b. Therefore, it is possible to raise and lower the movable seat 30 more smoothly.

  In addition, according to the present embodiment, even when a foreign object is caught in the movable seat 30 while the movable seat 30 is being lowered, the lowering of the movable seat 30 is prevented from being continued as it is. Therefore, it is possible to prevent seizure of the motor 51 and the like.

  In the above embodiment, the back frame portion 33c is formed substantially perpendicular to the seat frame 31, but the present invention is not limited to this. The first gist of the present invention is that the movable seat portion 30 is raised and lowered along the vertical direction with respect to the support portion 10.

  Therefore, if the movable seat portion 30 is configured to be lifted and lowered along the vertical direction with respect to the support portion 10, the back frame portion 33c is inclined (rearly tilted) to the back side with respect to the vertical direction. Also good.

  In the above embodiment, the armrest frame 34a can freely rotate within the range restricted by the rotation restricting member 36b of the armrest rotating mechanism 36, but the present invention is limited to this. It is not something. In addition, the armrest frame 34a may be configured to be held at an arbitrary angle by a ratchet mechanism or the like.

  Moreover, in the said embodiment, although resistance reduction part 45f, 46f was provided in the lower side guide roller 45b, 46b provided in the back side of the raising / lowering seat 1, the present invention is limited to this. It is not a thing. The resistance reduction units 45f and 46f may be provided on the upper guide rollers 43b and 43b provided on the back side of the liftable seat 1.

  In the above embodiment, the resistance reduction portions 45f and 46f are separated at the substantially central portion in the rotation axis direction of the lower guide rollers 45b and 46b. However, the present invention is not limited to this. is not. In addition, the lower guide rollers 45b and 46b may be integrally formed in the axial direction, and the resistance reducing portions 45f and 46f may be formed in a concave shape at a substantially central portion in the rotational axis direction of the lower guide rollers 45b and 46b. .

  Moreover, in the said embodiment, although the motor 51 was provided in the support part 10 and it was the structure which the ball screw 57 rotates, this invention is not limited to this. In addition, the movable seat 30 may be provided with a motor 51, the nut 33e may be rotated by a pulley / belt mechanism, and the movable seat 30 may be moved up and down together with the nut 33e.

The technical ideas other than the claims that can be grasped from the above embodiments will be described below.
(1) The support portion is configured to include a guide member extending upward with respect to the floor surface, and the movable seat portion includes a first position and a second position separated in the longitudinal direction of the guide member. A first moving member and a second moving member each sandwiched by a pair of guide rollers facing each other, at least of the pair of guide rollers provided on the first moving member or the second moving member; The lift seat chair according to claim 1 or 6, wherein a resistance reduction portion for reducing a contact surface with the guide member is formed.

  (2) The elevating seat chair according to (1) above, wherein the resistance reducing portion is formed by separating a substantially central portion of the guide roller in the rotation axis direction.

  (3) The resistance reduction portion is formed on a guide roller disposed on a back side of the guide member among a pair of guide rollers provided on the first moving member or the second moving member. The elevating seat chair according to 1 or 2 above.

  (4) One of the above-described 1 to 3, wherein one of the pair of guide rollers provided on the first moving member or the second moving member is disposed on the front side of the guide member. Lifting seat chair according to one.

  (5) The elevating seat chair according to claim 1 or 6, further comprising a pinching detection unit that detects pinching of foreign matter in the movable seat portion.

  (6) The pinching detection unit is movable along a lifting direction of the movable seat between the pinching detection switch provided on the floor surface side of the seat member and the pinching detection switch and the floor surface. 6. The elevating seat chair according to 5 above, further comprising a pinching detection plate arranged.

(7) In an elevating seat chair comprising a support unit placed on the floor, a movable seat unit supported by the support unit so as to be movable up and down, and an elevating drive unit for moving the movable seat unit up and down ,
The elevating seat chair, wherein the movable seat portion is provided with a covering member that integrally covers the support portion, the movable seat portion, and the elevating drive portion.

(8) In an elevating seat chair comprising a support unit placed on the floor, a movable seat unit supported by the support unit so as to be movable up and down, and an elevating drive unit for moving the movable seat unit up and down ,
The movable seat portion is provided with an armrest that extends in the front-rear direction of the elevating seat chair and serves as a user's elbow rest,
An elevating seat chair characterized in that an elevating switch is provided on the inner side of the tip of the armrest.

It is a perspective view which shows the structure of the raising / lowering seat chair which concerns on this embodiment. It is a side view which shows the structure of the raising / lowering seat chair which concerns on this embodiment. It is a top view which shows the structure of the raising / lowering seat chair which concerns on this embodiment. It is a rear view which shows the structure of the raising / lowering seat chair which concerns on this embodiment. It is a side view which shows the structure of the support part which concerns on this embodiment. It is the sectional view on the AA line of FIG. It is a rear view which shows the structure of the support part which concerns on this embodiment. It is the BB sectional view taken on the line of FIG. It is a side view which shows the structure of the raising / lowering seat part which concerns on this embodiment. It is a top view which shows the structure of the raising / lowering seat part which concerns on this embodiment. It is a rear view which shows the structure of the raising / lowering seat part which concerns on this embodiment. It is a side view which shows the structure of the armrest which concerns on this embodiment. It is a section side view showing the composition of the armrest rotating mechanism concerning this embodiment. It is explanatory drawing which shows a mode that the armrest which concerns on this embodiment operate | moves. It is explanatory drawing which shows a mode that the armrest rotation mechanism which concerns on this embodiment operate | moves. It is explanatory drawing which shows the structure of the 1st moving member which concerns on this embodiment. It is explanatory drawing which shows the structure of the 2nd moving member which concerns on this embodiment. It is explanatory drawing which shows a mode that the coating | coated member was coat | covered by the raising / lowering seat part which concerns on this embodiment. It is a side view which shows the structure of the raising / lowering drive part which concerns on this embodiment. It is a bottom view which shows the structure of the raising / lowering drive part which concerns on this embodiment. It is a block diagram which shows the electric constitution of the raising / lowering seat chair which concerns on this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lifting type seat chair 10 Support part 11 Base frame 11f, 11g Extension frame part 12, 13 Guide shaft 14, 15 Shaft support frame 16 Upper frame 22 Lifting detection mechanism 30 Movable seat part 31 Seat surface frame 32 Pinch detection mechanism 32a , 32b, 32c, 32d Pinch detection switch 32e Base plate 32f Pinch detection plate 33 Rear frame 33a, 33b Armrest support frame 33e Nut 34, 35 Armrest 34a, 35a Armrest frame 34b, 35b Armrest cover 36, 37 Armrest rotation mechanism 38 Lift switch 41, 42 Side frames 43, 44 First moving members 43a, 43b, 44a, 44b Upper guide rollers 45, 46 Second moving members 45a, 45b, 46a, 46b Dorora 45f, 46f resistance reducing portion 48 engaging piece 49 covering member 49a cushioning material 49b covering materials 49c inclined surface 50 elevation drive unit 51 motor 57 ball screw

Claims (14)

In an elevating seat chair comprising a support unit placed on the floor, a movable seat unit supported by the support unit so as to be movable up and down, and an elevating drive unit that elevates and lowers the movable seat unit.
The support portion includes a guide member extending in a substantially vertical direction with respect to the floor surface,
The movable seat is supported by the guide member so as to be movable up and down. The support portion includes a base frame that is placed on a floor surface and the guide member is erected,
The elevating seat chair according to claim 1, wherein the base frame is provided with an extending frame extending from the position where the guide member is provided to the back side along the floor surface.   The elevating seat chair according to claim 1, wherein the support portion is provided with a support frame that supports the guide member with respect to the extension frame. The movable seat includes a seat member on which a user sits, and a back member that supports the upper body of the user,
The elevating seat chair according to claim 1, wherein the back member is formed along a substantially vertical direction.   The elevating seat chair according to claim 4, wherein the back member is formed with an inclined surface inclined to the back side with respect to a vertical direction. In an elevating seat chair comprising a support unit placed on the floor, a movable seat unit supported by the support unit so as to be movable up and down, and an elevating drive unit that elevates and lowers the movable seat unit.
The movable seat portion is configured to include an armrest that serves as a user's elbow rest, an armrest support member that supports the armrest, and a fixed support member that fixedly supports the armrest support member.
The armrest support member is fixedly supported by the fixed support member in at least two places. The fixed support member includes a seat member on which a user sits, and a back member that supports the upper body of the user,
The elevating seat chair according to claim 6, wherein the armrest support member is connected to the seat member and the back member.   The elevating seat chair according to claim 6 or 7, wherein the armrest is rotatably provided on the armrest support member. In an elevating seat chair comprising a support unit placed on the floor, a movable seat unit supported by the support unit so as to be movable up and down, and an elevating drive unit that elevates and lowers the movable seat unit.
The movable seat portion includes a first moving member and a second moving member formed by sandwiching a first position and a second position separated in the longitudinal direction of the guide member by a pair of opposing guide rollers, respectively. Configured with
At least one of a pair of guide rollers provided on the first moving member or the second moving member is formed with a resistance reducing portion for reducing a contact surface with the guide member. Elevating seat chair.   The elevating seat chair according to claim 9, wherein the resistance reduction portion is formed by separating a substantially central portion of the guide roller in a rotation axis direction.   The resistance reduction portion is formed on a guide roller disposed on a back side of the guide member among a pair of guide rollers provided on the first moving member or the second moving member. Claim 11 or Claim 10. The elevating seat chair according to claim 10.   The one of the pair of guide rollers provided on the first moving member or the second moving member is disposed on the front side of the guide member. Lifting seat chair according to item. In an elevating seat chair comprising a support unit placed on the floor, a movable seat unit supported by the support unit so as to be movable up and down, and an elevating drive unit that elevates and lowers the movable seat unit.
An elevating seat chair having a pinch detection unit for detecting a pinch of foreign matter in the movable seat portion.   The sandwiching detection unit is disposed so as to be movable along the ascending / descending direction of the movable seat between the sandwiching detection switch provided on the floor surface side of the seat member and the sandwiching detection switch and the floor surface. The elevating seat chair according to claim 13, further comprising:

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